Abstract:
A data recording method in which serial data is recorded in blocks on a tape at a rate much higher than the data rate. Following recording (at 39) of a data block 40, tape motion is reversed (at 42) so that on recording of the next data block 40' the tape may be accelerated (45 to 38') to recording speed and the next data block recorded with a minimum gap between the blocks. The recorded data block is read and compared with the information which was recorded to verify operation of the recorded. The serial data is compared with a standard to verify validity.
Abstract:
Utilizing a three-wire input from a synchro, a signal representing the rate of rotation of the synchro shaft is generated by means of: summing amplifiers to generate signals representing the cosine of the shaft angle and the sine of the shaft angle; a circuit for generating a signal representing the tangent of the shaft angle; a circuit for generating the signal representing the cotangent of the shaft angle; feedback circuits for linearizing both the tangent and cotangent signals; a differentiator circuit for differentiating the tangent signal; a differentiator circuit for differentiating the cotangent signal; and a switching circuit for selecting the rate output from the differentiator with a linear output.